9514 1404 393
Answer:
- 3 ounces of 75%
- 7 ounces of 45%
Step-by-step explanation:
Let x represent the number of ounces of 75% silver needed. Then (10-x) is the number of ounces of 45% silver. The total silver required is ...
0.75x +0.45(10 -x) = 0.54(10)
0.30x +4.5 = 5.4
0.30x = 0.9
x = 0.9/0.3 = 3 . . . . . ounces of 75% silver
10-x = 7 . . . . . ounces of 45% silver
Luis needs 7 ounces of 45% silver and 3 ounces of 75% silver.
Answer:
$2.05
Step-by-step explanation:
$8/4 notebooks= $2
.20/4=.05
________________
$2.05
Answer:
7
Step-by-step explanation:
+2($($;$)2:
hope it helps
Answer:
B.
Step-by-step explanation:
hope it helps :)
brainliest pls? have a good day/night
Answer:
x = -8
y = -10
Step-by-step explanation:
Elimination
2x - 3y = 14
5x - 3y = -10
__________--
-3x = 24
x = 24/-3
x = -8
Subsitution
2x - 3y = 14
2(-8) - 3y = 14
-16 - 3y = 14
-3y = 14 + 16
-3y = 30
y = 30/-3
y = -10
